DE102008063982A1 - Semiconductor component and method for its production - Google Patents
Semiconductor component and method for its production Download PDFInfo
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- DE102008063982A1 DE102008063982A1 DE102008063982A DE102008063982A DE102008063982A1 DE 102008063982 A1 DE102008063982 A1 DE 102008063982A1 DE 102008063982 A DE102008063982 A DE 102008063982A DE 102008063982 A DE102008063982 A DE 102008063982A DE 102008063982 A1 DE102008063982 A1 DE 102008063982A1
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- layer
- arc
- pure
- metal
- antireflection coating
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims description 63
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000002184 metal Substances 0.000 claims abstract description 79
- 229910052751 metal Inorganic materials 0.000 claims abstract description 79
- 239000011248 coating agent Substances 0.000 claims abstract description 19
- 238000000576 coating method Methods 0.000 claims abstract description 19
- 239000000758 substrate Substances 0.000 claims abstract description 10
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 17
- 238000005245 sintering Methods 0.000 claims description 16
- 238000011065 in-situ storage Methods 0.000 claims description 13
- 230000008021 deposition Effects 0.000 claims description 7
- 229910010421 TiNx Inorganic materials 0.000 claims description 5
- 230000004888 barrier function Effects 0.000 claims description 5
- 238000009792 diffusion process Methods 0.000 claims description 5
- 239000005368 silicate glass Substances 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000005530 etching Methods 0.000 claims description 2
- 239000006117 anti-reflective coating Substances 0.000 claims 2
- 239000010410 layer Substances 0.000 abstract description 134
- 239000011229 interlayer Substances 0.000 abstract description 28
- 230000008569 process Effects 0.000 description 46
- 239000010936 titanium Substances 0.000 description 16
- 230000007547 defect Effects 0.000 description 13
- 230000000694 effects Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 238000000151 deposition Methods 0.000 description 5
- 230000008646 thermal stress Effects 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000001465 metallisation Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000035882 stress Effects 0.000 description 4
- 229910010038 TiAl Inorganic materials 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000000206 photolithography Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 229910016570 AlCu Inorganic materials 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000005380 borophosphosilicate glass Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000010406 interfacial reaction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
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- H01L23/522—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body
- H01L23/532—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body characterised by the materials
- H01L23/53204—Conductive materials
- H01L23/53209—Conductive materials based on metals, e.g. alloys, metal silicides
- H01L23/53214—Conductive materials based on metals, e.g. alloys, metal silicides the principal metal being aluminium
- H01L23/53223—Additional layers associated with aluminium layers, e.g. adhesion, barrier, cladding layers
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- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
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Abstract
Ein Halbleiterbauelement enthält eine Zwischenschicht-Dielektrikum-Schicht auf einem Substrat, einen Kontaktzapfen in der Zwischenschicht-Dielektrikum-Schicht, eine Metallschicht auf dem Kontaktzapfen und eine nicht reine Antireflexions-Beschichtungs(ARC)-Schicht auf der Metallschicht.A semiconductor device includes an interlayer dielectric layer on a substrate, a contact plug in the interlayer dielectric layer, a metal layer on the contact plug, and a non-pure antireflection coating (ARC) layer on the metal layer.
Description
HINTERGRUNDBACKGROUND
Ausführungen der vorliegenden Erfindung beziehen sich auf ein Halbleiterbauelement und ein Verfahren zu dessen Herstellung. In einem Halbleiterbauelement wird ein Metallisierungs-Prozess durch einen Durchkontaktierungs-Kontaktzapfen-Prozess und einen Metallleitungs-Prozess ausgeführt. Zusätzlich dazu kann auf der Metallleitung eine Antireflexions-Beschichtung (ARC) ausgebildet werden.versions of the present invention relate to a semiconductor device and a method for its production. In a semiconductor device becomes a metallization process through a via contact process and a Metal pipe process performed. additionally For this purpose, on the metal line an anti-reflection coating (ARC) are formed.
Nachdem der Metallisierungs-Prozess ausgeführt wurde, kann ein Sinter-Prozess auf der Basis einer Wärmebehandlung durchgeführt werden, um die Leistungsdaten des Halbleiterbauelementes zu verbessern.After this The metallization process has been run, a sintering process based on a heat treatment carried out to improve the performance of the semiconductor device.
Bei herkömmlichen Herstellungsprozessen können thermische Belastungen die Folge des Sinter-Prozesses sein, und der Unterschied zwischen den thermischen Ausdehnungskoeffizienten der Metallleitung und einer Zwischenschicht-Dielektrikum-Schicht kann zu Defekten oder Problemen führen. Zum Beispiel kann es sein, dass Metall-Anhebungen und Risse im Zwischenmetall-Dielektrikum (IMD) durch eine Reaktion an der Grenzfläche der Metallleitung und der Antireflexions-Beschichtungs-Schicht stärker werden. Folglich kann das Phänomen von Kontaktflächen-Löchern auftreten, bei dem die Metallschicht von einem vorher festgelegten Bereich einer Metall-Kontaktfläche (oder einem Bereich einer Durchkontaktierungs-Anordnung) getrennt wird. Dies kann zu Defekten an einem äußeren Teil des Bauelementes führen und die Zuverlässigkeit des Bauelementes verschlechtern.at usual Manufacturing processes can thermal stresses will be the result of the sintering process, and the difference between the thermal expansion coefficients the metal line and an interlayer dielectric layer can lead to defects or problems. For example it can be metal elevations and cracks in intermetal dielectric (IMD) by a reaction at the interface of the metal conduit and the Antireflection coating layer become stronger. Consequently, can the phenomenon of contact surface holes occur at the metal layer from a predetermined area of a Metal pad (or a region of a via arrangement) separately becomes. This can lead to defects on an outer part of the component to lead and the reliability of the component deteriorate.
Zusätzlich dazu können bei herkömmlichen Prozessen durch thermische Belastung Metall-Fehlstellen zwischen der Metallleitung und der Antireflexions-Beschichtungs-Schicht erzeugt werden.Additionally can in conventional processes due to thermal stress metal defects between the metal line and the antireflection coating layer.
ZUSAMMENFASSUNGSUMMARY
Ausführungen der vorliegenden Erfindung liefern ein Halbleiterbauelement, und Verfahren zu dessen Herstellung. Die hier beschriebenen Bauelemente und Verfahren sind in der Lage, Probleme, die mit thermischen Belastungen verbunden sind, zu minimieren oder zu vermeiden, indem die Eigenschaften einer Grenzflächen-Oberfläche zwischen einer Zwischenschicht-Dielektrikum-Schicht und einer Metallleitung verbessert werden.versions of the present invention provide a semiconductor device, and Process for its preparation. The components described here and methods are capable of problems with thermal loads are connected, minimize or avoid by the properties an interface surface between an interlayer dielectric layer and a metal line can be improved.
Ausführungen der vorliegenden Erfindung liefern auch ein Halbleiterbauelement und ein Verfahren zu dessen Herstellung, das in der Lage ist, zu verhindern, dass Metall-Fehlstellen durch thermische Belastungen erzeugt werden, wenn ein Sinter-Prozess durchgeführt wird, indem die Eigenschaft(en) einer Grenzflächen-Oberfläche zwischen einer Zwischenschicht-Dielektrikum-Schicht und einer Metallleitung verbessert werden. Gemäß Ausführungen der vorliegenden Erfindung enthält ein Halbleiterbauelement eine Zwischenschicht-Dielektrikum-Schicht auf einem Substrat, einen Kontaktzapfen in der Zwischenschicht-Dielektrikum-Schicht, eine Metallschicht auf dem Kontaktzapfen und eine nicht reine Antireflexions-Beschichtungs-(ARC)-Schicht auf der Metallschicht.versions The present invention also provides a semiconductor device and a method of manufacturing the same which is capable of preventing that metal defects are generated by thermal stresses, if a sintering process carried out is determined by the property (s) of an interface surface between an interlayer dielectric layer and a metal line can be improved. According to embodiments of the present invention contains a semiconductor device an interlayer dielectric layer on a Substrate, a contact plug in the interlayer dielectric layer, a metal layer on the contact plug and a non-pure antireflection coating (ARC) layer on the metal layer.
Gemäß anderen Ausführungen der vorliegenden Erfindung umfasst ein Verfahren zur Herstellung eines Halbleiterbauelementes die Schritte eines Ausbildens einer Zwischenschicht- Dielektrikum-Schicht auf einem Substrat, eines Ausbildens eines Kontaktzapfens in der Zwischenschicht-Dielektrikum-Schicht, eines Ausbildens einer Metallschicht auf dem Kontaktzapfen, eines Ausbildens einer nicht reinen Antireflexions-Beschichtungs-(ARC)-Schicht auf der Metallschicht, eines Ausbildens einer Metallleitung durch selektives Ätzen der Metallschicht und der nicht reinen ARC-Schicht und eines Sinterns der Metallleitung.According to others versions The present invention comprises a process for the preparation a semiconductor device, the steps of forming a Interlayer dielectric layer on a substrate, forming a contact pin in the Interlayer dielectric layer, forming a metal layer on the contact plug, a Forming a non-pure antireflection coating (ARC) layer the metal layer, forming a metal line by selectively etching the metal line Metal layer and the non-pure ARC layer and a sintering the metal line.
Im vorliegenden Halbleiterbauelement und im Verfahren zu dessen Herstellung können die Eigenschaften einer Grenzflächen-Oberfläche zwischen der Zwischenschicht-Dielektrikum-Schicht und der Metallleitung verbessert werden, indem ein plasmaunterstützter Prozess mit undotiertem Silikatglas (PE USG) verwendet wird, der die Eigenschaften einer Schnittstelle zwischen einer dielektrischen Schicht und einer Metallschicht bezüglich Zugbelastungen verbessert. Folglich kann die Belastungsschwankung vor/nach dem Sinter-Prozess minimiert werden, und ein Kontaktflächen-Loch-Effekt eines Halbleiterbauelementes (z. B. eines CMOS-Bildsensors (CIS)), der durch Abheben von Metall und IMD-Risse verursacht wird, kann effektiv verringert oder verhindert werden. Zusätzlich dazu können gemäß der Ausführungen der vorliegenden Erfindung Defekte in einem äußeren Teil eines Produktes, die durch den Kontaktflächen-Loch-Effekt verursacht werden, verhindert werden, so dass die Zuverlässigkeit des Produktes verbessert werden kann.in the present semiconductor device and in the process for its preparation can the properties of an interface surface between the interlayer dielectric layer and the metal line is improved be by a plasma enhanced Process is used with undoped silicate glass (PE USG), the the properties of an interface between a dielectric layer and a metal layer with respect to Tensile loads improved. Consequently, the load fluctuation be minimized before / after the sintering process, and a contact surface hole effect a semiconductor device (eg, a CMOS image sensor (CIS)), which is caused by lifting of metal and IMD cracks can be effectively reduced or prevented. In addition, according to the explanations the present invention defects in an outer part of a product, caused by the contact surface hole effect, be prevented, so that the reliability of the product improves can be.
Zusätzlich dazu wird, wenn die Metallleitung ausgebildet wird, die nicht reine ARC-Schicht durch einen In-Situ-Prozess ausgebildet, so dass thermische Belastungsänderungen durch den Sinter-Prozess minimiert werden können. Folglich können Metall-Fehlstellen eines Bildsensors effektiv verhindert werden. Zusätzlich dazu können die Belastungs-Migrations- Eigenschaften (SM) verbessert werden. Somit können die Toleranzen des Metallisierungs-Prozesses sichergestellt und die Zuverlässigkeit des Halbleiterbauelementes (z. B. eines CMOS-Bildsensors) verbessert werden.In addition, when the metal line is formed, the non-pure ARC layer is formed by an in-situ process, so that thermal load changes by the sintering process can be minimized. Consequently, metal defects of an image sensor can be effectively prevented. In addition, the stress migration properties (SM) can be improved. Thus, the tolerances of the metallization process can be ensured and the reliability of the semiconductor device (eg, a CMOS image sors).
KURZBESCHREIBUNG DER ZEICHNUNGENBRIEF DESCRIPTION OF THE DRAWINGS
die
DETAILLIERTE BESCHREIBUNG DER AUSFÜHRUNGENDETAILED DESCRIPTION OF THE VERSIONS
Im Folgenden werden ein Halbleiterbauelement und ein Verfahren zu dessen Herstellung gemäß Ausführungen der vorliegenden Erfindung im Detail mit Bezug auf die begleitenden Zeichnungen beschrieben.in the Next, a semiconductor device and a method of the same Production according to specifications the present invention in detail with reference to the accompanying Drawings described.
In der folgenden Beschreibung der verschiedenen Ausführungen versteht sich von selbst, dass wenn eine Schicht (oder ein Film) als "auf" oder "unter" einer anderen Schicht bezeichnet wird, sie direkt auf oder unter der anderen Schicht liegen kann, oder eine oder mehrere dazwischen liegende Schichten vorhanden sein können.In the following description of the different versions It goes without saying that if a layer (or a film) as "on" or "under" another layer is called, they are directly on or below the other layer can, or one or more intervening layers exist could be.
Ferner ist die vorliegende Erfindung nicht auf einen Bildsensor beschränkt, sondern auf alle Halbleiterbauelemente an wendbar, bei denen eine Antireflexions-Beschichtungs-(ARC)-Schicht und ein Sinter-Prozess verwendet werden.Further For example, the present invention is not limited to an image sensor, but Applicable to all semiconductor devices including an antireflection coating (ARC) layer and a sintering process be used.
Ausführungenversions
Im
Allgemeinen kann das Halbleiterbauelement eine Zwischenschicht-Dielektrikum-Schicht
In
bevorzugten Ausführungen
kann die Zwischenschicht-Dielektrikum-Schicht
Ferner
kann in manchen Ausführungen
eine Diffusions-Barrieren-Schicht
Die
nicht reine ARC-Schicht
Noch
mit Bezug auf
Insbesondere
ist
Im
Gegensatz dazu hat das Halbleiterbauelement gemäß Ausführungen der vorliegenden Erfindung
("PE-USG/in-situ
ARC") eine Zugbelastungs-Charakteristik
zwischen der Zwischenschicht-Dielektrikum-Schicht
Gemäß Ausführungen der vorliegenden Erfindung liefert der PE USG/In-Situ-ARC-Prozess (I) ausreichende und/oder zusätzliche Toleranzen gegen thermische Belastung, so dass es möglich ist, einen Kontaktflächen-Loch-Effekt, der durch das Abheben von Metall und IMD-Risse durch den Sinter-Prozess mit 450°C verursacht wird, effektiv zu verringern oder zu verhindern.According to comments In accordance with the present invention, the PE provides USG / In Situ ARC process (I) sufficient and / or additional Tolerances against thermal stress, so that it is possible a contact surface hole effect, by lifting off metal and IMD cracks through the sintering process with 450 ° C caused to reduce or prevent effectively.
Wie
in
Mit
anderen Worten wird in dem Halbleiterbauelement gemäß Ausführungen
der vorliegenden Erfindung die Zwischenschicht-Dielektrikum-Schicht
Im
Folgenden wird das Verfahren zur Herstellung des Halbleiterbauelementes
gemäß der vorliegenden
Erfindung mit Bezug auf
Eine
Zwischenschicht-Dielektrikum-Schicht
Die
Zwischenschicht-Dielektrikum-Schicht
Im
Folgenden werden die Eigenschaften der Zwischenschicht-Dielektrikum-Schicht
Indessen führt im Vergleich zu IMD-Prozessen, bei denen PE CVD benutzt wird, ein IMD-Prozess, bei dem HDP CVD benutzt wird, im Allgemeinen zu größeren Temperaturänderungen des Substrats. Somit können durch thermische Belastungen ein Abheben des Metalls, Metall-Fehlstellen und Änderungen des Widerstands (RS) des Metalls auftreten. Um die Probleme zu beseitigen, wird gemäß Ausführungen der vorliegenden Erfindung PE USG anstelle des mehr zusammendrückenden HDP USG abgeschieden, so dass Metall-Fehlstellen verhindert werden können.However, in comparison to IMD processes using PE CVD, an IMD process using HDP CVD generally results in larger temperature changes of the substrate. Thus, thermal stresses can cause metal lifting, metal defects, and changes in metal resistance (R S ). In order to eliminate the problems, according to embodiments of the present invention, PE USG is deposited instead of the more compressive HDP USG so that metal defects can be prevented.
Nach
dem Abscheiden der Schicht
In
manchen Ausführungen
kann ferner zwischen dem Kontaktzapfen
Vor
dem Ausbilden des Durchkontaktierungslochs kann ferner eine Deckschicht
auf der Zwischenschicht-Dielektrikum-Schicht
In
verschiedenen Ausführungen
kann ferner eine Trägerschicht
Danach
wird die Metallschicht
Dann
wird die nicht reine ARC-Schicht
Zum Beispiel kann die erste ARC-Schicht eine Ti-Schicht umfassen. Die zweite ARC-Schicht kann eine TiN-Schicht umfassen und kann durch den In-Situ-Prozess ausgebildet werden. Die Erfindung ist jedoch nicht darauf beschränkt.To the For example, the first ARC layer may comprise a Ti layer. The second ARC layer may comprise a TiN layer and may by be formed the in-situ process. However, the invention is not limited to this.
Alternativ
dazu kann die nicht reine ARC-Schicht
Im
Folgenden wird der Prozess des Ausbildens der nicht reinen ARC-Schicht
Gemäß beispielhaften
Ausführungen
kann, wenn die nicht reine ARC-Schicht
Zum
Beispiel kann die Gesamtdicke beider Schichten der nicht reinen
ARC-Schicht
Da
Wasserstoff-(H)-Fangstellen durch Ti erhöht werden, kann es jedoch sein,
dass die Dunkel-Charakteristik der Metallschicht
In
beispielhaften Ausführungen
kann die nicht reine ARC-Schicht
Ferner kann eine Abscheidungs-Rate (D/R) der ersten ARC-Schicht größer als die D/R der zweiten ARC-Schicht sein. Zum Beispiel kann die D/R der ARC-Ti-Schicht erhöht werden (z. B. auf mindestens 1000 Å/min oder jeden größeren Mindestwert, wie z. B. mindestens 2000, 4000 oder 6000 Å/min), um TiAl3 zu minimieren. Im Gegensatz dazu kann die D/R der TiN-Schicht verringert werden (z. B. auf höchstens 2000 Å/min oder jeden kleineren Maximalwert, wie z. B. höchstens 1500, 1000 oder 500 Å/min), um eine dichte Schicht auszubilden. Dies kann verhindern, dass das Aluminium (Al) durch einen Entwickler angegriffen wird, der beim Fotolithografie-Prozess benutzt wird.Further, a deposition rate (D / R) of the first ARC layer may be greater than the D / R of the second ARC layer. For example, the D / R of the ARC-Ti layer may be increased (eg, to at least 1000 Å / min or any greater minimum value, such as at least 2000, 4000, or 6000 Å / min) to form TiAl 3 to minimize. In contrast, the D / R of the TiN layer can be reduced (eg, at most 2000 Å / min or any smaller maximum value, such as at most 1500, 1000 or 500 Å / min) to a dense layer train. This can prevent the aluminum (Al) from being attacked by a developer used in the photolithography process.
Der
Prozess des Ausbildens der nicht reinen ARC-Schicht
In manchen Fällen kann die Metallleitung durch Cu-Segregation (Bildung einer Θ-Phase) verkürzt werden, die durch einen Langzeit-Aufenthalt in einer Kammer (z. B. bei 200°C) verursacht wird, wenn ein Problem auftritt. Folglich kann eine Verringerung der Ausbeute auftreten. Somit ist es, um das oben erwähnte Problem zu verhindern, vorzuziehen, den In-Situ- ARC-Prozess zum Ausbilden der nicht reinen ARC-Schicht bei einer niedrigen Temperatur von 50°C oder weniger auszuführen.In some cases Can the metal line by Cu segregation (formation of a Θ-phase) shortened which are caused by a long-term stay in a room (eg. At 200 ° C) is caused when a problem occurs. Consequently, a reduction the yield occur. Thus, it is the problem mentioned above to prevent, prefer the in-situ ARC process to form the not pure ARC layer at a low temperature of 50 ° C or less perform.
In manchen Ausführungen kann die erste ARC-Schicht in einer Atmosphäre von Argon-Gas (Ar) mit einer Flussrate von 60 sccm bis 100 sccm ausgebildet werden, und die zweite ARC-Schicht kann in einer Atmosphäre von Ar-Gas mit einer Flussrate von 40 sccm bis 60 sccm und Stickstoff-Gas (N2) mit einer Flussrate von 80 sccm bis 120 sccm ausgebildet werden.In some embodiments, the first ARC layer may be formed in an atmosphere of argon gas (Ar) at a flow rate of 60 sccm to 100 sccm, and the second ARC layer may be operated in an atmosphere of Ar gas at a flow rate of 40 sccm up to 60 sccm and nitrogen gas (N 2 ) with a flow rate of 80 sccm up 120 sccm be formed.
Zum Beispiel kann in einer beispielhaften Ausführung, um eine dichte nicht reine TiNx-Schicht-Struktur auszubilden, der In-Situ-ARC-Prozess ein Prozessgas mit 80 sccm Ar (z. B. während der Abscheidung von Ti), bzw. 50/100 sccm von Ar/N2 (z. B. während der Abscheidung von TiN) benutzen. Dies ist gewünscht, um zu verhindern, dass Al durch einen Entwickler in dem folgenden Fotolithografie-Prozess angegriffen wird.For example, in an exemplary embodiment, to form a dense non-pure TiN x layer structure, the in-situ ARC process may include a process gas having 80 sccm Ar (eg, during deposition of Ti), or 50 / 100 sccm of Ar / N 2 (eg during the deposition of TiN). This is desired to prevent Al from being attacked by a developer in the following photolithography process.
Danach
werden die Metallschicht
In dem Halbleiterbauelement und im Verfahren zu dessen Herstellung gemäß der verschiedenen hier beschriebenen Ausführungen kann die Charakteristik einer Grenzflächen-Oberfläche zwischen der Zwischenschicht-Dielektrikum-Schicht und der Metallleitung durch den PE-USG-Prozess verbessert werden. da die Eigenschaften einer IMD-/Metall-Schicht im Hinblick auf Zugbelastungen verbessert werden. Folglich können Belastungsänderungen vor/nach dem Sinter-Prozess minimiert werden, und ein Kontaktflächen-Loch-Effekt eines Halbleiterbauelementes (z. B. eines CMOS-Bildsensors (CIS)), der durch Abheben von Metall und IMD-Risse verursacht wird, kann effektiv begrenzt werden. Zusätzlich dazu können gemäß der Ausführungen der vorliegenden Erfindung Defekte in und Beschädigungen eines äußeren Teils eines Produktes, die durch den Kontaktflächen-Loch-Effekt verursacht werden, verhindert werden, so dass die Zuverlässigkeit des Produktes verbessert werden kann.In the semiconductor device and in the method for its production according to the different ones here described embodiments For example, the characteristic of an interface surface between the interlayer dielectric layer and the metal line can be improved by the PE-USG process. because the properties of an IMD / metal layer in terms of tensile loads be improved. Consequently, you can Load changes before / after minimized by the sintering process, and a contact surface hole effect a semiconductor device (eg, a CMOS image sensor (CIS)), which is caused by lifting of metal and IMD cracks can be effectively limited. additionally can do this according to the statements the present invention defects in and damage of an outer part of a product caused by the contact surface hole effect can be prevented so the reliability of the product can be improved.
Zusätzlich dazu kann gemäß beispielhafter hier beschriebener Ausführungen, wenn die Metallleitung ausgebildet wird, die nicht reine ARC-Schicht durch einen In-situ-Prozess ausgebildet werden, so dass die thermischen Belastungsänderungen durch den Sinter-Prozess minimiert werden können. Folglich können Metall-Fehlstellen eines Bildsensors effektiv verhindert werden. Zusätzlich dazu können, da die SM-Eigenschaften verbessert werden, die Toleranzen des Metallisierungs-Prozesses sichergestellt und die Zuverlässigkeit des Halbleiterbauelementes verbessert werden.Additionally may be as exemplified here described embodiments, when the metal line is formed, the non-pure ARC layer through be formed in situ process, so that the thermal load changes can be minimized by the sintering process. Consequently, metal defects can an image sensor can be effectively prevented. Additionally can, As the SM properties are improved, the tolerances of the metallization process are ensured and the reliability of the semiconductor device can be improved.
Die vorliegende Erfindung sollte nicht auf diese beispielhaften Ausführungen begrenzt werden, sondern ein Fachmann kann verschiedene Änderungen und Abwandlungen vornehmen, die im Geist und im Umfang der vorliegenden Erfindung liegen, wie im Folgenden beansprucht.The The present invention should not be limited to these exemplary embodiments be limited, but a professional can make various changes and make modifications in the spirit and scope of the present Invention as claimed below.
In der vorliegenden Beschreibung bedeutet jeder Verweis auf "eine Ausführung", "Ausführung", "beispielhafte Ausführung", usw., dass ein spezielles Merkmal, eine Struktur oder eine Eigenschaft, welches bzw. welche in Verbindung mit der Ausführung beschrieben wird, in mindestens einer Ausführung der Erfindung enthalten ist. Das Auftreten derartiger Ausdrucksweisen an verschiedenen Stellen in der Beschreibung verweist nicht notwendig sämtlich auf die gleiche Ausführung. Ferner sei bemerkt, dass, wenn ein besonderes Merkmal, eine Struktur oder eine Eigenschaft beschrieben wird, es sich innerhalb des Bereichs der Möglichkeiten eines Fachmanns befindet, ein derartiges Merkmal, eine Struktur oder ein Kennmerkmal in Verbindung mit anderen der Ausführungen zu bewirken.In In the present specification, any reference to "an embodiment", "execution", "exemplary embodiment", etc. means that a special feature, structure or property which or which is described in connection with the embodiment, in at least one execution of the Invention is included. The occurrence of such expressions in different places in the description does not necessarily refer all on the same design. It should also be noted that, if a particular feature, a structure or a property is described, it is within range the possibilities a person skilled in the art, such a feature, a structure or an identifier in conjunction with other of the embodiments to effect.
Obwohl Ausführungen mit Bezug auf eine Anzahl erläuternder Ausführungsbeispiele beschrieben wurden, sei bemerkt, dass zahlreiche weitere Abwandlungen und Ausführungen durch Fachleute entworfen werden können, welche unter Prinzip und Umfang der vorliegenden Offenbarung fallen. Insbesondere sind viele Änderungen und Abwandlungen der Bauteile und/oder der Anordnungen der fraglichen Kombinationsanordnung innerhalb des Umfangs der Offenbarung, der Zeichnungen und der beigefügten Ansprüche möglich. Zusätzlich zu Änderungen und Abwandlungen der Bauteile und/oder der Anordnungen sind alternative Verwendungen gleichfalls für Fachleute ersichtlich.Even though versions with reference to a number of illustrative embodiments It should be noted that numerous other modifications and designs can be designed by professionals, which in principle and scope of the present disclosure. In particular are many changes and modifications of the components and / or the arrangements of the in question Combination arrangement within the scope of the disclosure, the Drawings and the attached claims possible. additionally to changes and modifications of the components and / or the arrangements are alternative Uses also for Skilled in the art.
Claims (20)
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KR (1) | KR20090069569A (en) |
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KR100503381B1 (en) * | 2002-12-30 | 2005-07-26 | 동부아남반도체 주식회사 | Metal line in a semiconductor and method for forming the same |
US6821886B1 (en) * | 2003-09-05 | 2004-11-23 | Chartered Semiconductor Manufacturing Ltd. | IMP TiN barrier metal process |
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